<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <!--
        1.列表过滤
        2.列表排序
    -->
    <div id="demo">
        <input type="text" v-model="searchName">
        <ul>
            <li v-for= "(p,index in filterPersons" :key="index">
                {{index}}---{{p.name}}--{{p.age}}
            </li>
        </ul>
        <button @click="setOrderType(1)">年龄升序</button>
        <button @click="setOrderType(2)">年龄降序</button>
        <button @click="setOrderType(0)">原本顺序</button>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        new Vue({
            el:'#demo',
            data:{
                searchName:'',
                orderType: 0, //0代表原本顺序 1代表升序2代表降序
                persons:[
                    {name:'tom', age:18},
                    {name:'lily', age:12},
                    {name:'lucy', age:19},
                    {name:'rose', age:21},
                    {name:'Bob',age:29}
                ],
            },
            computed:{
                filterPersons(){
                    //取出相关的数据
                    const{searchName,persons,orderType} = this
                    //最终需要显示的数组
                    let fPersons;
                    //对persons进行过滤
                    fPersons = persons.filter(p => p.name.indexOf(searchName)!==-1)
                    //排序
                    if(orderType!==0){
                        fPersons.sort(function(p1,p2){
                            //1代表升序，2代表降序
                            if(orderType===2){
                                return p2.age-p1.age
                            }else{
                                return p1.age-p2.age
                            }
                        })
                    }
                    return fPersons
                }
            },

            methods:{
                setOrderType(orderType){
                    this.orderType = orderType
                }
            }
        })
    </script>
</body>
</html>